From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/usb/misc/yurex.c | 530 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 530 insertions(+) create mode 100644 drivers/usb/misc/yurex.c (limited to 'drivers/usb/misc/yurex.c') diff --git a/drivers/usb/misc/yurex.c b/drivers/usb/misc/yurex.c new file mode 100644 index 000000000..c640f98d2 --- /dev/null +++ b/drivers/usb/misc/yurex.c @@ -0,0 +1,530 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for Meywa-Denki & KAYAC YUREX + * + * Copyright (C) 2010 Tomoki Sekiyama (tomoki.sekiyama@gmail.com) + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRIVER_AUTHOR "Tomoki Sekiyama" +#define DRIVER_DESC "Driver for Meywa-Denki & KAYAC YUREX" + +#define YUREX_VENDOR_ID 0x0c45 +#define YUREX_PRODUCT_ID 0x1010 + +#define CMD_ACK '!' +#define CMD_ANIMATE 'A' +#define CMD_COUNT 'C' +#define CMD_LED 'L' +#define CMD_READ 'R' +#define CMD_SET 'S' +#define CMD_VERSION 'V' +#define CMD_EOF 0x0d +#define CMD_PADDING 0xff + +#define YUREX_BUF_SIZE 8 +#define YUREX_WRITE_TIMEOUT (HZ*2) + +/* table of devices that work with this driver */ +static struct usb_device_id yurex_table[] = { + { USB_DEVICE(YUREX_VENDOR_ID, YUREX_PRODUCT_ID) }, + { } /* Terminating entry */ +}; +MODULE_DEVICE_TABLE(usb, yurex_table); + +#ifdef CONFIG_USB_DYNAMIC_MINORS +#define YUREX_MINOR_BASE 0 +#else +#define YUREX_MINOR_BASE 192 +#endif + +/* Structure to hold all of our device specific stuff */ +struct usb_yurex { + struct usb_device *udev; + struct usb_interface *interface; + __u8 int_in_endpointAddr; + struct urb *urb; /* URB for interrupt in */ + unsigned char *int_buffer; /* buffer for intterupt in */ + struct urb *cntl_urb; /* URB for control msg */ + struct usb_ctrlrequest *cntl_req; /* req for control msg */ + unsigned char *cntl_buffer; /* buffer for control msg */ + + struct kref kref; + struct mutex io_mutex; + unsigned long disconnected:1; + struct fasync_struct *async_queue; + wait_queue_head_t waitq; + + spinlock_t lock; + __s64 bbu; /* BBU from device */ +}; +#define to_yurex_dev(d) container_of(d, struct usb_yurex, kref) + +static struct usb_driver yurex_driver; +static const struct file_operations yurex_fops; + + +static void yurex_control_callback(struct urb *urb) +{ + struct usb_yurex *dev = urb->context; + int status = urb->status; + + if (status) { + dev_err(&urb->dev->dev, "%s - control failed: %d\n", + __func__, status); + wake_up_interruptible(&dev->waitq); + return; + } + /* on success, sender woken up by CMD_ACK int in, or timeout */ +} + +static void yurex_delete(struct kref *kref) +{ + struct usb_yurex *dev = to_yurex_dev(kref); + + dev_dbg(&dev->interface->dev, "%s\n", __func__); + + if (dev->cntl_urb) { + usb_kill_urb(dev->cntl_urb); + kfree(dev->cntl_req); + usb_free_coherent(dev->udev, YUREX_BUF_SIZE, + dev->cntl_buffer, dev->cntl_urb->transfer_dma); + usb_free_urb(dev->cntl_urb); + } + if (dev->urb) { + usb_kill_urb(dev->urb); + usb_free_coherent(dev->udev, YUREX_BUF_SIZE, + dev->int_buffer, dev->urb->transfer_dma); + usb_free_urb(dev->urb); + } + usb_put_intf(dev->interface); + usb_put_dev(dev->udev); + kfree(dev); +} + +/* + * usb class driver info in order to get a minor number from the usb core, + * and to have the device registered with the driver core + */ +static struct usb_class_driver yurex_class = { + .name = "yurex%d", + .fops = &yurex_fops, + .minor_base = YUREX_MINOR_BASE, +}; + +static void yurex_interrupt(struct urb *urb) +{ + struct usb_yurex *dev = urb->context; + unsigned char *buf = dev->int_buffer; + int status = urb->status; + unsigned long flags; + int retval, i; + + switch (status) { + case 0: /*success*/ + break; + /* The device is terminated or messed up, give up */ + case -EOVERFLOW: + dev_err(&dev->interface->dev, + "%s - overflow with length %d, actual length is %d\n", + __func__, YUREX_BUF_SIZE, dev->urb->actual_length); + return; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + case -EILSEQ: + case -EPROTO: + case -ETIME: + return; + default: + dev_err(&dev->interface->dev, + "%s - unknown status received: %d\n", __func__, status); + return; + } + + /* handle received message */ + switch (buf[0]) { + case CMD_COUNT: + case CMD_READ: + if (buf[6] == CMD_EOF) { + spin_lock_irqsave(&dev->lock, flags); + dev->bbu = 0; + for (i = 1; i < 6; i++) { + dev->bbu += buf[i]; + if (i != 5) + dev->bbu <<= 8; + } + dev_dbg(&dev->interface->dev, "%s count: %lld\n", + __func__, dev->bbu); + spin_unlock_irqrestore(&dev->lock, flags); + + kill_fasync(&dev->async_queue, SIGIO, POLL_IN); + } + else + dev_dbg(&dev->interface->dev, + "data format error - no EOF\n"); + break; + case CMD_ACK: + dev_dbg(&dev->interface->dev, "%s ack: %c\n", + __func__, buf[1]); + wake_up_interruptible(&dev->waitq); + break; + } + + retval = usb_submit_urb(dev->urb, GFP_ATOMIC); + if (retval) { + dev_err(&dev->interface->dev, "%s - usb_submit_urb failed: %d\n", + __func__, retval); + } +} + +static int yurex_probe(struct usb_interface *interface, const struct usb_device_id *id) +{ + struct usb_yurex *dev; + struct usb_host_interface *iface_desc; + struct usb_endpoint_descriptor *endpoint; + int retval = -ENOMEM; + DEFINE_WAIT(wait); + int res; + + /* allocate memory for our device state and initialize it */ + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + goto error; + kref_init(&dev->kref); + mutex_init(&dev->io_mutex); + spin_lock_init(&dev->lock); + init_waitqueue_head(&dev->waitq); + + dev->udev = usb_get_dev(interface_to_usbdev(interface)); + dev->interface = usb_get_intf(interface); + + /* set up the endpoint information */ + iface_desc = interface->cur_altsetting; + res = usb_find_int_in_endpoint(iface_desc, &endpoint); + if (res) { + dev_err(&interface->dev, "Could not find endpoints\n"); + retval = res; + goto error; + } + + dev->int_in_endpointAddr = endpoint->bEndpointAddress; + + /* allocate control URB */ + dev->cntl_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!dev->cntl_urb) + goto error; + + /* allocate buffer for control req */ + dev->cntl_req = kmalloc(YUREX_BUF_SIZE, GFP_KERNEL); + if (!dev->cntl_req) + goto error; + + /* allocate buffer for control msg */ + dev->cntl_buffer = usb_alloc_coherent(dev->udev, YUREX_BUF_SIZE, + GFP_KERNEL, + &dev->cntl_urb->transfer_dma); + if (!dev->cntl_buffer) { + dev_err(&interface->dev, "Could not allocate cntl_buffer\n"); + goto error; + } + + /* configure control URB */ + dev->cntl_req->bRequestType = USB_DIR_OUT | USB_TYPE_CLASS | + USB_RECIP_INTERFACE; + dev->cntl_req->bRequest = HID_REQ_SET_REPORT; + dev->cntl_req->wValue = cpu_to_le16((HID_OUTPUT_REPORT + 1) << 8); + dev->cntl_req->wIndex = cpu_to_le16(iface_desc->desc.bInterfaceNumber); + dev->cntl_req->wLength = cpu_to_le16(YUREX_BUF_SIZE); + + usb_fill_control_urb(dev->cntl_urb, dev->udev, + usb_sndctrlpipe(dev->udev, 0), + (void *)dev->cntl_req, dev->cntl_buffer, + YUREX_BUF_SIZE, yurex_control_callback, dev); + dev->cntl_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + + /* allocate interrupt URB */ + dev->urb = usb_alloc_urb(0, GFP_KERNEL); + if (!dev->urb) + goto error; + + /* allocate buffer for interrupt in */ + dev->int_buffer = usb_alloc_coherent(dev->udev, YUREX_BUF_SIZE, + GFP_KERNEL, &dev->urb->transfer_dma); + if (!dev->int_buffer) { + dev_err(&interface->dev, "Could not allocate int_buffer\n"); + goto error; + } + + /* configure interrupt URB */ + usb_fill_int_urb(dev->urb, dev->udev, + usb_rcvintpipe(dev->udev, dev->int_in_endpointAddr), + dev->int_buffer, YUREX_BUF_SIZE, yurex_interrupt, + dev, 1); + dev->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + if (usb_submit_urb(dev->urb, GFP_KERNEL)) { + retval = -EIO; + dev_err(&interface->dev, "Could not submitting URB\n"); + goto error; + } + + /* save our data pointer in this interface device */ + usb_set_intfdata(interface, dev); + dev->bbu = -1; + + /* we can register the device now, as it is ready */ + retval = usb_register_dev(interface, &yurex_class); + if (retval) { + dev_err(&interface->dev, + "Not able to get a minor for this device.\n"); + usb_set_intfdata(interface, NULL); + goto error; + } + + dev_info(&interface->dev, + "USB YUREX device now attached to Yurex #%d\n", + interface->minor); + + return 0; + +error: + if (dev) + /* this frees allocated memory */ + kref_put(&dev->kref, yurex_delete); + return retval; +} + +static void yurex_disconnect(struct usb_interface *interface) +{ + struct usb_yurex *dev; + int minor = interface->minor; + + dev = usb_get_intfdata(interface); + usb_set_intfdata(interface, NULL); + + /* give back our minor */ + usb_deregister_dev(interface, &yurex_class); + + /* prevent more I/O from starting */ + usb_poison_urb(dev->urb); + usb_poison_urb(dev->cntl_urb); + mutex_lock(&dev->io_mutex); + dev->disconnected = 1; + mutex_unlock(&dev->io_mutex); + + /* wakeup waiters */ + kill_fasync(&dev->async_queue, SIGIO, POLL_IN); + wake_up_interruptible(&dev->waitq); + + /* decrement our usage count */ + kref_put(&dev->kref, yurex_delete); + + dev_info(&interface->dev, "USB YUREX #%d now disconnected\n", minor); +} + +static struct usb_driver yurex_driver = { + .name = "yurex", + .probe = yurex_probe, + .disconnect = yurex_disconnect, + .id_table = yurex_table, +}; + + +static int yurex_fasync(int fd, struct file *file, int on) +{ + struct usb_yurex *dev; + + dev = file->private_data; + return fasync_helper(fd, file, on, &dev->async_queue); +} + +static int yurex_open(struct inode *inode, struct file *file) +{ + struct usb_yurex *dev; + struct usb_interface *interface; + int subminor; + int retval = 0; + + subminor = iminor(inode); + + interface = usb_find_interface(&yurex_driver, subminor); + if (!interface) { + printk(KERN_ERR "%s - error, can't find device for minor %d", + __func__, subminor); + retval = -ENODEV; + goto exit; + } + + dev = usb_get_intfdata(interface); + if (!dev) { + retval = -ENODEV; + goto exit; + } + + /* increment our usage count for the device */ + kref_get(&dev->kref); + + /* save our object in the file's private structure */ + mutex_lock(&dev->io_mutex); + file->private_data = dev; + mutex_unlock(&dev->io_mutex); + +exit: + return retval; +} + +static int yurex_release(struct inode *inode, struct file *file) +{ + struct usb_yurex *dev; + + dev = file->private_data; + if (dev == NULL) + return -ENODEV; + + /* decrement the count on our device */ + kref_put(&dev->kref, yurex_delete); + return 0; +} + +static ssize_t yurex_read(struct file *file, char __user *buffer, size_t count, + loff_t *ppos) +{ + struct usb_yurex *dev; + int len = 0; + char in_buffer[20]; + unsigned long flags; + + dev = file->private_data; + + mutex_lock(&dev->io_mutex); + if (dev->disconnected) { /* already disconnected */ + mutex_unlock(&dev->io_mutex); + return -ENODEV; + } + + spin_lock_irqsave(&dev->lock, flags); + len = snprintf(in_buffer, 20, "%lld\n", dev->bbu); + spin_unlock_irqrestore(&dev->lock, flags); + mutex_unlock(&dev->io_mutex); + + if (WARN_ON_ONCE(len >= sizeof(in_buffer))) + return -EIO; + + return simple_read_from_buffer(buffer, count, ppos, in_buffer, len); +} + +static ssize_t yurex_write(struct file *file, const char __user *user_buffer, + size_t count, loff_t *ppos) +{ + struct usb_yurex *dev; + int i, set = 0, retval = 0; + char buffer[16 + 1]; + char *data = buffer; + unsigned long long c, c2 = 0; + signed long timeout = 0; + DEFINE_WAIT(wait); + + count = min(sizeof(buffer) - 1, count); + dev = file->private_data; + + /* verify that we actually have some data to write */ + if (count == 0) + goto error; + + mutex_lock(&dev->io_mutex); + if (dev->disconnected) { /* already disconnected */ + mutex_unlock(&dev->io_mutex); + retval = -ENODEV; + goto error; + } + + if (copy_from_user(buffer, user_buffer, count)) { + mutex_unlock(&dev->io_mutex); + retval = -EFAULT; + goto error; + } + buffer[count] = 0; + memset(dev->cntl_buffer, CMD_PADDING, YUREX_BUF_SIZE); + + switch (buffer[0]) { + case CMD_ANIMATE: + case CMD_LED: + dev->cntl_buffer[0] = buffer[0]; + dev->cntl_buffer[1] = buffer[1]; + dev->cntl_buffer[2] = CMD_EOF; + break; + case CMD_READ: + case CMD_VERSION: + dev->cntl_buffer[0] = buffer[0]; + dev->cntl_buffer[1] = 0x00; + dev->cntl_buffer[2] = CMD_EOF; + break; + case CMD_SET: + data++; + fallthrough; + case '0' ... '9': + set = 1; + c = c2 = simple_strtoull(data, NULL, 0); + dev->cntl_buffer[0] = CMD_SET; + for (i = 1; i < 6; i++) { + dev->cntl_buffer[i] = (c>>32) & 0xff; + c <<= 8; + } + buffer[6] = CMD_EOF; + break; + default: + mutex_unlock(&dev->io_mutex); + return -EINVAL; + } + + /* send the data as the control msg */ + prepare_to_wait(&dev->waitq, &wait, TASK_INTERRUPTIBLE); + dev_dbg(&dev->interface->dev, "%s - submit %c\n", __func__, + dev->cntl_buffer[0]); + retval = usb_submit_urb(dev->cntl_urb, GFP_ATOMIC); + if (retval >= 0) + timeout = schedule_timeout(YUREX_WRITE_TIMEOUT); + finish_wait(&dev->waitq, &wait); + + /* make sure URB is idle after timeout or (spurious) CMD_ACK */ + usb_kill_urb(dev->cntl_urb); + + mutex_unlock(&dev->io_mutex); + + if (retval < 0) { + dev_err(&dev->interface->dev, + "%s - failed to send bulk msg, error %d\n", + __func__, retval); + goto error; + } + if (set && timeout) + dev->bbu = c2; + return timeout ? count : -EIO; + +error: + return retval; +} + +static const struct file_operations yurex_fops = { + .owner = THIS_MODULE, + .read = yurex_read, + .write = yurex_write, + .open = yurex_open, + .release = yurex_release, + .fasync = yurex_fasync, + .llseek = default_llseek, +}; + +module_usb_driver(yurex_driver); + +MODULE_LICENSE("GPL"); -- cgit v1.2.3